What are popular "weird history" or "forgotten space tech" topics currently trending on social media for space enthusiasts?

Based on these sources, the most shareable “weird history” and forgotten space-tech topics for space fans are: Cold War moon and Mars plans that never flew, like Project Mars, NERVA, Project Horizon, and the Nova rocket concept^{[7][9][11][22]}.

Another big topic is secret or abandoned military space stations, especially the Manned Orbiting Laboratory (MOL), with its reconnaissance role, camera systems, and strange side projects such as satellite inspection and recovery^[3][10].

People also love the “what if NASA had kept going?” stories: canceled Apollo missions, Skylab rescue and reboost plans, and other post-Apollo station ideas such as Space Station Freedom and inflatable habitats^{[22][29][13][21]}.

Weird Soviet projects are another reliable crowd-pleaser, including the armed Salyut-3 station, giant orbiting mirrors, Buran, Polyus, and other sci-fi-style military concepts^[14][18][15].

On the lighter, more viral side, audiences seem drawn to odd human-in-space stories such as Laika, the space tortoises, the corned-beef sandwich, the gorilla suit on the ISS, and Sergei Krikalev being stranded by the collapse of the Soviet Union^[1][29].

A newer social-media-friendly angle is “forgotten tech that came back,” especially Starship-style Mars thinking, lunar-to-Mars architecture, and old nuclear propulsion ideas resurfacing in modern planning debates^[7][9][25].

If you want, I can turn these into a ranked list of the best TikTok or YouTube Shorts hooks.